I often cite this video from Vi Hart as the reason I do what I do.
Before I knew the name Martin Gardner and long before I knew about Math Circles, I was teaching ideas from Vi Hart to homeschool kids who got together for a once-a-week class centered around Math Olympiad (MOEMS) contests.
Her videos are dense and fast, but she’s a wonderful artist showing some awesome mathematics in a delightfully quirky way.
Paul Gafni 